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Old 25th May 2006, 10:15 PM   #1
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Join Date: Apr 2006
Location: Toronto
Default Solder Paste Question

I purchased some solder paste /flux to use to help me the solder flow for hot tinning some PCBs I'm etching.

There is no information on the container other than "solder paste". It there a way to tell via some test etc if this is the electronic flux or the plumbing flux?
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Old 25th May 2006, 11:05 PM   #2
poobah is offline poobah  United States
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Join Date: Nov 2005
Don't use it if you don't know EXACTLY what it is...

Paste fluxes are generally used for plumbing. In electronics they show up in solder / flux paste formulas used for reflow soldering SMT parts.

Kester #331 is a nice liquid flux that will work well. It also washes off nicely with hot water and doesn't pollute.

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Old 26th May 2006, 07:23 AM   #3
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
solder paste and flux paste are two completely different products.

Solder paste is a flux with solder powder incorporated.

However, you do need to check what kind of flux and it's compatability with electronic circuit boards.
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 26th May 2006, 07:34 PM   #4
artz is offline artz  United Kingdom
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Join Date: May 2006
Default solder paste

Hi Im new to the forums but iam a surface mount engineer and i know a bit about solder paste . Does it have a name? if it does i can probably tell you what it is ie is it Alpha/fry/indium or such like?
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